野火光盘gpio操作部分库函数全解

@briefInitializestheGPIOxperipheralaccordingtotheparametersinthe@paramGPIOx:wherexcanbe(A..G)toselecttheGPIO@paramGPIO_InitStruct:pointertoaGPIO_InitTypeDefstructurecontainstheconfigurationinformationforthespecifiedGPIO@retvalvoidGPIO_Init(GPIO_TypeDef*GPIOx,GPIO_InitTypeDef*{uint32_tcurrentmode=0x00,currentpin=0x00,pinpos=0x00,pos=0x00;uint32_ttmpreg=0x00,pinmask=0x00;/*Checktheparameters*///检查参数，其中pin GPIOMode currentmode=((uint32_t)GPIO_InitStruct->GPIO_Mode)&if((((uint32_t)GPIO_InitStruct->GPIO_Mode)&((uint32_t)0x10))!={/*Checktheparameters*//*Outputmodecurrentmode|=(uint32_t)GPIO_InitStruct-} GPIOCRL /*Configuretheeightlowportpinsif(((uint32_t)GPIO_InitStruct->GPIO_Pin&((uint32_t)0x00FF))!={tmpreg=GPIOx-for(pinpos=0x00;pinpos<0x08;{//8pos=((uint32_t)0x01)<<//1/*Gettheportpinspositioncurrentpin=(GPIO_InitStruct->GPIO_Pin)&//如果取与相等证明证明该posif(currentpin=={pos=pinpos<</*Clearthecorrespondinglowcontrolregisterbits*/pinmask=((uint32_t)0x0F)<<pos;tmpreg&=/*Writethemodeconfigurationinthecorrespondingbitstmpreg|=(currentmode<</*ResetthecorrespondingODRbitif(GPIO_InitStruct->GPIO_Mode=={GPIOx->BRR=(((uint32_t)0x01)<<如果检测为下拉输入，那么就通过BRR{/*SetthecorrespondingODRbitif(GPIO_InitStruct->GPIO_Mode=={GPIOx->BSRR=(((uint32_t)0x01)<<}}}}GPIOx->CRL=} GPIOCRH /*Configuretheeighthighportpinsif(GPIO_InitStruct->GPIO_Pin>{tmpreg=GPIOx-for(pinpos=0x00;pinpos<0x08;{pos=(((uint32_t)0x01)<<(pinpos+/*Gettheportpinspositioncurrentpin=((GPIO_InitStruct->GPIO_Pin)&pos);if(currentpin==pos){pos=pinpos<</*Clearthecorrespondinghighcontrolregisterbits*/pinmask=((uint32_t)0x0F)<<pos;tmpreg&=/*Writethemodeconfigurationinthecorrespondingbits*/tmpreg|=(currentmode<<pos);/*ResetthecorrespondingODRbitif(GPIO_InitStruct->GPIO_Mode=={GPIOx->BRR=(((uint32_t)0x01)<<(pinpos+}/*SetthecorrespondingODRbitif(GPIO_InitStruct->GPIO_Mode=={GPIOx->BSRR=(((uint32_t)0x01)<<(pinpos+}}}GPIOx->CRH=}}voidGPIO_EXTILineConfig(uint8_tGPIO_PortSource,uint8_t{uint32_ttmp=/*Checktheparameters*/tmp=((uint32_t)0x0F)<<(0x04*(GPIO_PinSource&AFIO->EXTICR[GPIO_PinSource>>0x02]&=AFIO->EX